I`m usually a lurker here. But it seems like some people are continuously having an issue with side pressure of Ether2. I have a rather large head and had the same issue before. I tried to address this issue with suede pads and perforated pads. But to no avail that didn`t help much to improve...

The 3d wings of r70x are made of plastic and they feel quite durable. So you don`t have to worry about their build quality. They won`t break, unless you try to break it.